Punch ing-machine



No. 626, 362. Patented June 6, I899.

T. B. BLAIR.

PUNCHING MACHINE.

(Application filed Nov. 17, 1898.)

2H0 Model.) 2 Sheets-Sheet l.

1 1 x/arftur T1 um aslifllaiv- YE Y- 21m No. 626, 362. Patented lune 6,I899.

T. B. BLAIR.

PUNCHING MACHINE.

(Application filed Nov. 17, 1898.) (No Model.) 2 Sheets-Sheet 2.

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PUNCHlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 626,362, dated June 6,1899. i it tion filed November 17,1898. Serial No. 696,689. (Nomodelo Toall whom it may concern.-

Be it known that I, THOMAS E. BLAIR, a citizen of the United States,residing at Nee nah, in the county of WVinnebago and State of Wisconsin,have invented a new and useful Improvement in'Punching-Machines, whichare to be operated with the foot of the work man and are for use inprinting-offices, but the improvements upon which this application ismade are equally applicable to hand or power machines, both large andsmall, for use in punching holes in metal or other material, of whichthe following is a specification.

My improvements consist in the manner of constructing the punch-holderand connecting the holder to the plunger-plate, whereby the punches canbe firmly held and quickly adjusted to the dies in whatever positionupon the die-groove in the bed-plate the dies may be and to the mannerof securing the die upon the bed-plate at any point'within itsdiegroove, and also to a supplemental table to be secured upon thebed-plate and to a gage for use in placing the material to be punched inthe correct position upon the table for being punched; and the object ofmy improvements is to produce a punching-machine forprinters andbookbinders use in'which clean-cut holes can be punched and in which aplurality of both the punches and dies can be easily and quickly changedin position for punching holes at greater or less distances apart, saidimprovements being illustrated in the accompanying drawings, in which--Figure 1 is aside elevation of the punchingmachine supported upon abracket or shelf 5, the lower. part of said bracket and of the rodconnecting the main plunger-shaft and footlever being broken and thesupplemental table which belongs upon the top of the bedplate beingremoved. Fig. 2 is a plan of the plunger-plate. Fig. 3 is a plan of thebedplate of the machine. Fig. 4 is a vertical section across the die andits holder. Fig. 5 is a plan of the bed-plate with the plunger removedand with its supplemental table in position thereon. Fig. 6 is a frontelevation of the punching-machine, its lower portion being broken awayand its supplemental table removed. Fig. 7 is a plan of thepunch-holder. Fig. Sis an elevation of a punch to beinserted in and heldby said holder. Fig. 9 is a side view of one of the back gages, and Fig.10 is a side View of one of the punch-strippers.

All of the figures are upon the same scale excepting Figs. 4, 7, and 8,they being upon an enlarged one. Similar numerals of reference indicatelike parts in all of the views.

- 1 indicates the bed-plate of the punching-mm chine; 1,its hub; 2, thepunch-stock orplungerplate; 2,its hubs; 3,the principal guiding shaft; 33,the shaft-holes in the bed-plate; 4L, smallguiding-shaft; 4,shaft-holein plunger; 5, shelf or bracket supportingthe punchingmachine;6, foot-lever for operating punch; 6, lever fulcrum-pins; 7, connectionbetween lever and plunger-shaft; 8, groove in guidingshaft; 9, set-screwin hub of bed-plate; 10, set-screws in hub of plunger-plate; 11,setscrews in rear end of plunger-plate; 12, dieholding groove inbed-plate; 13, slot through bottom of groove; 14, slots throughplungerplate; 15, gib in groove 12; 16, set-screws for tightening gib17, the die-holder; 18, the die; 19, the punch-holder; 20, punches; 21,setscrews for holding the die in its holder; 22, bolts for securing thepunch-holder to the plunger-plate; 28, the punch-hole in the die; 24 and25, holes in bed-plate for receiving the punch-stripper and supplementaltable holding bolts, respectively; 26, supplemental table; 27,punch-strippers; 28, the end gage; 29, the back gages; 30, a rivet forconnecting the end 29' and body 29 together; 31, thumbnut bolts forsecuring gages in position; 32, the puncl1-stripper-holding bolts; 33, aslot in the supplemental table; 34, bolts for securing table tobed-plate; 35 and 35, springs for.

holding plunger at the highestlimit of its movement; 36, the floor ofbuilding.

The bed-plate 1 has the two guiding-shaft holes 3' and 3", thebolt-holes 24 and 25, groove 12, slot 13, gib 15, set-screws 1G, hub 1,and set-screw 9. The shaft 3 is turned to a sliding fit within the hole3, and the shaft 4 is firmly fixed within the hole 3" of the bedplate. Agroove 8 is planed lengthwise of 9 extends and holds the bed-plate fromturning around upon the shaft, while allowing the shaft to slide up anddown therein. Above said bed-plate and firmly secured to the shaft 3with set-screws 10 is arranged the plungerthe shaft, into which the endof the set-screw IOO plate 2, its rear end having a hole at, throughwhich the shaft 4: is fitted to slide easily. In the present case saidhole is considerably larger than the shaft 4-, and set-screws areinserted in opposite sides of said, hole, extending into it and bearingupon opposite sides of said shaft for swinging the opposite end of theplunger around upon the shaft slightly for adjusting said end, so thatthe punch-holder slots 14 will be brought over the groove 12 of thebed-plate in a suitable position.

Springs 35 and 35 are mounted upon the bed-plate around the shafts 3 and4. for holding the plunger at the desired distance above the bed-plate.through. the bed-plate and its hub a short distance and is connectedwith a foot-lever 6 by means of the connecting-pieces 7, the lever beingsuitably fulcrumed for being pressed down by the foot of the operator.

The dies 18 consist of short cylinders of steelhavin g a central holelengthwise thereof. These dies are fitted to be held in the cubicalblock or die-holder 17 by means of set-screws 21, and the die-holdersare fitted to be held at any desired point Within the groove 12 by andthe dies becoming too much worn for use only the cylindrical partrequires renewal.

The punches may be of any suitable form and size, but are preferably ofabout the form shown in Fig. 8, with a tapering shank. The shanks arefitted to a tapering hole in the punch-holder 19, which holders are tobe bolted to the plunger-plate through the slots let with bolt 22, thebolt being located in the holder at a point eccentric with the axialline of the punch, whereby by loosening the bolts of any two holders thepunches therein can be moved toward or from each other and swung to theright or left of the slot for bringing the punches to correspond withtheir dies in position. Gages 28 and 29 are made with slotslongitudinally thereof, through which thumb-nut bolts 31 are fitted topass and secure the gages upon the table. The gage 29 is made of twoparts, the front end 29 being connected with the main body of the gageby means of the rivet 30 and said front end arranged to swing upon itspivot, whereby whatever the angle the body of the gage is with the rearedge of rear edge.

Strippers 27 are provided for stripping the material punched from thepunches as the punches are withdrawn after punching said The shaft 3extends downmaterial. The punches and dies having been adjusted to theposition desired, the supplemental table 26 is then secured in positionupon thebed-plate with bolts 34. The back and end gages are thenadjusted to the desired position for the work in hand and thepunchstrippers secured upon the bed-plate. Upon taking a package ofpaper of suitable thickness and inserting it under the strippers uponthe table 26 and up to the gages 28 and 20 and giving a quick andforcible downward move ment of the foot upon the foot-lever holes can bemade quickly and of a uniform size and at uniform distances apart. Thesprings should be of the proper degree of resiliency for pulling thepunches from the material punched and for holding the punches at theupward limit of their movement and ready for the removal of the packagepunched and the insertion of another.

It will be evident that by making the front end of the bed-plate ofsufficient size the gages can be bolted to it and the supplemental table23 dispensed with, said table being used principally by reason of itslightness and convenience, its less cost, and for partially covering thegroove 12. 1

Having described my invention, What I claim, and desire to secure .byLetters Patent, 1s

1. In a punching-machine in combination with its plunger, apunch-holder, a punch therefor, and a bolt for securing the holder tosaid plunger, the axial lines of said punch and bolt being eccentric,one with the other, I

substantially as described.

2. In a punching-machine, in. combination with its plunger-plate, one ormore slots in said plate, one or more punch-holders, each having a punchtherein, each holder having a bolt adapted to pass through a slot insaid plate and to secure the holder upon said plunsaid screws,substantially as described.

4:. In a punching-machine, the combination I of its bed-plate having adie secured therein, a supplemental table secured upon said bedplatehaving gages adjustable thereon for gaging the position of the materialto be punched and means for securing said gages upon said 'table,substantially as set forth.

the material to be punched'the front end of l said gage can be broughtsquarely against said 5. In a punching-machine, a gage for gaging theposition of the material to be punched,

consisting of a slotted main portion and a sepapunched at Whatever theangle is of said main portion with said edge of the material,substantially as described.

6. In a pun oiling-machine, the combination of the following elements, abed-plate having a groove transversely thereof, means for securing a dieat any point in the length of said groove, a plunger plate verticallyrecipr0ca tive above said bed-plate, and having a punchholder boltedthereto, the punch and bolt of said holder having their axial lineseccentric one with the other, pi'lnch-strippers secured upon saidbed-plate,sprin gs arranged between said bed-plate and plunger fornormally holdin g said plunger at the upward limit of its movement, alever suitably fulcrumed for operatin g said plunger and a suitableconnection between said plunger and lever substantially as described.

THOMAS B. BLAIR.

Witnesses:

BYRON SANDERS, J. C. HILTON.

